Question

A conjoint and open vascular bundle will be observed in the transverse section of

• A. monocot root
• B. monocot stem
• C. dicot root
• D. dicot stem

Answer 1

The Correct Option is D

Vascular bundles which contain both xylem and phloem are called conjoint vascular bundles. In gymnosperms and dicot stems vascular bundles contain both xylem, phloem and a strip of vascular cambium (between phloem and xylem of each vascular bundle) called intrafascicular (or fascicular) cambium. It produces secondary tissues. Such vascular bundles are described as open because the original or primary phloem and xylem separate on the production of secondary tissues by vascular cambium. Thus, conjoint and open vascular bundles will be observed in dicot stem.